Uponor 21205A Pex-a Tubing 0.5 Inch Cts Red 20 Foot

Product Description

The UPONOR 21205A is a 1/2-inch CTS (Copper Tube Size) red PEX-A tubing sold in 20-foot lengths, designed for use in residential and light commercial plumbing, radiant heating, and potable water distribution systems. PEX-A is manufactured using the Engel (peroxide) method, which produces the highest degree of cross-linking among PEX types, resulting in superior flexibility and shape memory. The red color coding identifies this tubing as intended for hot-water lines, simplifying rough-in identification for plumbers and HVAC technicians during installation.

This tubing is appropriate for hydronic radiant floor heating, domestic hot water supply, and other closed-loop or open water distribution applications. Its flexibility allows it to be routed through framing, around obstacles, and into manifold systems with minimal fittings. The 20-foot length suits single-run drops or shorter branch circuits in residential manifold-based plumbing layouts. Licensed plumbers and hydronic heating contractors are the typical installers for this product type.

Key Features

• PEX-A construction using the Engel method for maximum cross-link density and flexibility
• Red color coding identifies hot-water service lines at a glance
• 1/2-inch CTS sizing is compatible with standard PEX expansion and crimp fitting systems
• 20-foot length provides a manageable single-coil run for branch or drop installations
• High shape memory allows kinks to be repaired with a heat gun without cutting out the section

Compatibility

Designed as an OEM-style flexible tubing solution for 1/2-inch CTS PEX plumbing and radiant heating systems. Specific compatible fitting systems or manifold brands were not identified in the available product data.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure before making any connections. Use only fittings and tools rated for PEX-A tubing at the appropriate CTS size, and avoid over-bending beyond the minimum bend radius to prevent flow restriction.

Technical Specifications

• Tubing Type: PEX-A (Engel Method)
• Size: 1/2 inch CTS
• Color: Red
• Length: 20 feet
• UPC: 813927011871
• Order Increment: 1

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: 21205A